Pipe and iron cutter.



M. L. GILMOUR.

PIPE AND IRON GUTTER. APPLIOATION FILED mlmz, 1914.

Patented Mar. 2, 1915.

Guru/tuus@ THE NORRIS PETERS C04. FHOTG-LITHO. WASHINGTON. D. C4

M. L. 'GILMOUB..

PIPE AND IRON GUTTER.

APPLICATION FILED JAN.12, 1914.

Patented Mar. 2, 1915.

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'HE NORRIS PETERS CO.. PHOTO-LITHC.. WASHINGTON. D. C,

MARRIAlVI L. GILMOUR, OF DAVENPORT, IOWA.

PIPE AND IRON CUTTER.

Specification of Letters Patent.

Patented Mar. 2, 1915.

Application` led January 12, 1914. Serial N o. 811,657.

To all wwm t may concern.'

Be it known that I, MARRIAM L. GILMOUR, citizen of the United States, residing at Davenport, in the county of Scott and State of Iowa, have invented certain new and useful Improvements in Pipe and Iron Cutters, of which the following is a specification.

My invention relates to metallic pipe and rod cutting tools, being primarily intended for use as an iron pipe cutter, the chief object of my invention being the provision of a pipe cutter employing a cutting tool similar to that employed in the ordinary turning lathes in order that the pipe may be cut cleanly and without undue compression of the cut edges. v

kPractically all pipe cutting tools now in use employ either rotary cutters or cutters of other types in which the cutting action is dependent wholly upon the pressure of the cutting blade or element against the pipe being cut, the result being that the ends of the pipe sections, when cut, are turned inwardly and the internal diameter of the pipe sections, at their ends, therefore reduced, with the result that it is more diiicult to couple the pipe sections together when de# sired, and the further result that the raw edges thus left cut into and destroy any packing rings interposed between adjacent pipe ends. A My improved pipe cutter is primarily intended to overcome these disadvantages by the employment of a cutting tool of the type used in metallic lathe work in which the pressure of the tool against the material being cut need be but slight in order to permit proper operation.

A. further object of my invention is to construct a tool of the above described character which may be hand operable and which will require the application of but little force in its employment.

A still further object of my invention is the provision of a cutting tool so constructed that it may be readily clamped to the pipe, rod or other work operated upon, thereby doing away with the necessity of positively holding the tool in place during use. In this connection I provide co-acting gripping jaws and a flexible chain connecting the jaws and adapted to pass about the pipe or rod being cut, the jaws being so arranged that any desired degree of tension may be applied to the chain when the latter is in place.

A further object of my invention therefore consists in the provision of work engaging bearings for the gripping jaws and chains so constructed and arranged as to reduce to a minimum all friction between the tool and the work being operated upon.

A still further object of my invention consists in the provision of a positive, manually operated feed mechanism for advancing the cutting member of the tool as the depth of the cut progresses. And astill further object of my invention is theprovision of a chip guard or apron adjacent the cutting member or blade arranged to prevent the passage of chips or shavings cut from the pipe or rod beneath the gripping chain.

With these and other objects-in view, vmy invention will be more fully described, illustrated in the accompanying drawings, and then specifically pointed out inthe claims which are attachedto and form a this application.

part of In thedrawingsp-#Figure 1 is a perspec- .v

tive view of my improved tool in use, a por-v tion of the tool stock being broken away to permit the showing of the tool upon a larger scale;Fig. 2 is a central longitudinal sectionall view of the structure shown in Fig. l; Fig. 3 is a plan viewy of the tool; Fig. 4 is a detail view, partly in section, of the controlling mechanism for the gripping jaws of i the tool.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters. Y

The preferred embodiment of my invention, as illustrated in the drawings, includes a body portion or stock indicated as a whole by the numeral 10, this body member being tubular in construction to provide a longitudinal bore 11 and terminating at one end in an enlarged head 12 counterbored to provide a chuck receiving socket 13, this socket being formed with a llongitudinally extending keywayy 111. Slidably'mounted in the socket 13 is a tool chuckl 15 of any suitable type, being preferably formed circular in cross section and provided with a shoulder 16 slidably seatingv in the keyway 14to prevent turning of the chuck in the socket.

The outer end of the chuck 15 is preferably somewhat reduced and is recessed as at 17 to seatthe inner endco'f a conventional cutting tool 18 of the type commonly employed in metallic turning lathes, this cutting tool being normally held in place by a set bolt 19. The opposite end of the body portionV or stock 1 0 of my improved tool is reduced to provide a-n annularstop shoulder 2O to seatthe inner edge of a cap or thimble 21. A'feed screw 22 is rotatably mounted in the'bore 11 ofthe Stmk ywith Oneend-tl1reeded 21S. at 23 Afor engagement in the internallyk .threaded, longitudinally extending' bore or socketwf of theechuck 15. The opposite end of the feed screw 22 extends Athrough an opening in thecap or thimble 21 and is provided with any suitablev form of!v hand wheel 25., That end of the feed Vscrewl extending into the hub portion ofthelhandpwheel is squared to preventv independent turningv movementE `of the parts and the handl wheel is held against longitudinal dispplacement v from the feed screw lbymeans of a set screw 26I threaded into the end of the feedscrew with its head engagingin av socket oi-counvtersunk recess formed in the outer faceofjthe: handwheel, The feed screw, 22,:immediately withiny the Cap 0rthimbl v211epre-v.dedwith an. auf nular shoulder 27 whichI engages. against the inner face of the thi-mble 4and therefore preventsthe feed screw freiny slippingE oueof the-stock of the jttoolethefythimble 21,*bei`ng either threaded orotherwise detachably secured to the stock. y 4 j,

From the foregoing descriptionjitlwill be apparent that the tool chuck, together with the. Cutting tool lfmr be byrrerrtura ing' of the handk wheell 25j,iwitlfidrawn4 into the chuck socket 13er extended anyy .desired distance beyond the lopen end thereof'. At the= same time, the engagement of lthe shoulder 16 of the chuck inA the keyw'ay vv14; of the chuck socket preventsany rotation of the chuck and consequent turning movement of the cutting member v 18.

y In order to` providemeans'forholding the above described cutting tool in proper en!- gagement with the pipe rodor otherqwork being operated upon, I provide coacting Pairs Qf srrrneiiaws 28 and 29e-11d weer: ping elementor chain 30.v rldins'ure a .clear understanding, during further -explanation ofvmy improved tool., the gripping jaws28 will be designated as Vthe primary gripping jawscwhile thegripping:jaws 29 `will be termed the secondarygripping jaws.

The primary. grippingvjaws `28 kare each pivotedbetween a pair of ears 31 formed integrally with the ,rear portion ofthel head 12 of the stock, the ears betweenwhichone of the. jawsy 28 pivoted being diametricallynlocated with respect' toit/he earsl between which the.L other Apivoted. Each of the gripping jaws extends outwardly and forwardly from its pivotal end toa point somewhat in advance of the stock head 12 and isY then. bifurcated to form spaced arms 32 which curve inwardly. Each oftheseprimary. gripping jaws 28 is provided adjacent the juncture of its arms 32 with an outwardly and rearwardly directed hook 33 to engage the gripping chain 30 as will be later explained. lThe free ends of the arms 32 of the gripping jaws 28 are perforated to receive shafts 341- upon lwhich are journaled the work engaging rollers 35, theserollers being locatedy between the arms of thev jaws.

:As best disclosed in Figs. 1 and l, there are two pairsv of secondary gripping jaws, diametrically located with respect to each other. Icollar 36 slidably surrounds the stock head 12 of the tool and these secondary gripping jaws areipivotally connected at their inner ends to thislcollar by bolts v37, each bolt passing through they overlapping inner ends of one pair of the secondary gripping jaws. The freel or outer ends of the secondary gripping jaws are perforated to receiveV the extended endsof the shafts 34, onejaw of each pair1` ofl secondary gripping jaws being pivotally connected to oneof the shafts 34, while the other jaws of'said pairs of jaws arek connected to the other shaft 34. 1t will be readily apparenty from the above description thatany forward movement of the collarr36 will tend to move the rollers 35 away from leach otherand from the cuttingytool 18while any rearward movement ofthe collar will bring the rollers toward eachother. j I e, l j

In order to provide means for predeterminedly Ymoving the collar 3.6 along the chuck headj 12 and for normally holding the same against such. movement, the intermediate portion of the tooll stock 10 is externally threaded, as shown at 38 to receive ay hand: wheel orrjnut 39` having `a hub portion Aprovided with a circumferential channelA 40. yThe stock furtherhprovided at diametrically opposite sides land at a point intermediate4 its threaded portion and the head 12 with radially extending, perforated ears el, these earsv being preferably, formed to extend .atl right angles to the ears 31 between which the primary gripping jaws are pivote@ A split ring 42 is rotatablyl mounted in the groove or channel l0 of the hub portion of the .hand wheel or nut 39.7and eachpart of this split ring is .Provided with a laterallydirected `extension or rod 413. lThese rods43 passthrough the perforatedmears 11 and lextend at their free ends into or through perforations 111 formed at diametrically oppositeparts of the `collar 36.y The same set bolts 3'( which secure. the secondn arygripping jaws, to the collarj3'6 bear by their inner ends against the free ends of the rods 43 to lock them against disengagement from the collar36. The abutting end portions of the split ring 42 are preferably dove-tailed or otherwise fitted together and secured against disengagement by pins 45.

From the foregoing description it will be clear that the turning of the hand wheel or adjusting nut 39 toward the forward end or head portion of the tool stock, will advance the collar 36 and spread the rollers 35, while opposite movement of the adjusting nut will tend to draw the rollers toward each other. The gripping chain which co-acts with the primary and secondary gripping jaws and rollers 35 and which has been previously indicated as a whole by the numeral 30, includes a plurality of arcuate side bars or links 46 arranged in spaced pairs with the overlapping ends of adjacent pairs pivotally connected by pintle pins or shafts 47. Each of these pintle pins or shafts 47 forms a journal for a roller bearing 48, the bearings being located between the side portions 46 of the chain and being so proportioned as to extend peripherally beyond such portions and to, at the same time, leave sufficient space between adjacent bearings to permit engagement of the chain upon the hooks 33 of the primary jaws in the manner shown inthe drawings.

In order to insure an exact understanding of the application and employment of my improved cutting tool I have shown it in use as a pipe cutter, a section of pipe being shown at 49 and the tool being shown firmly clamped in place about the pipe. 'Io apply the tool in the position shown, the hand wheel 25 is first turned to suitably retract the chuck 15 and tool 18 carried thereby and the adjusting nut 39 turned to spread the jaw carried rollers 35. The tool is thenV applied against the pipe to bring the cutting edge of the cutting member in engagement with the periphery of the pipe and the chain 30 engaged at one end upon one of the hooks 33 and passed about the pipe and engaged with the other hook 33, the chain being drawn as tight as possible. |Ihe adjusting nut 39 is then turned to move the rollers 35 toward each other and consequently into engagement with the outer face of the pipe 49. As soon as these rollers 35 come into engagement with the pipe they tend to force the pipe away from the tool and consequently bind the pipe firmly in place. It will therefore be seen that with the exception of the cutting edge of the cutting member 18, the sole engagement of the tool with the pipe is that of the rollers 35 carried by the gripping jaws and certain of the bearing rollers 48 of the gripping chain. It will therefore be clear that the tool may be rotated about the pipe by the application of relatively slight force. To cut the pipe, the tool is rotated continuously about the pipe in the same direction,`the direction of rotation being dependent upon the position occupied by the cutting member 18. As the tool is rotated, the hand wheel 25 is turned from time to time to advance or feed the cutting member and so keep it in proper active engagement with the pipe.

In order to facilitate the proper manipulation of thetool, the cap or thimble 21 is preferably provided with diametrically extending hand grips 50 by which the tool may be conveniently grasped. To prevent chips or shavings cut from the pipe or other work being operated upon from passing`under the rollers 35, or the rollers 48 of the chain, I provide a chip shield or apron 51 of leather or other flexible material which is secured at one end to the chuck 15 by the same set bolt 19 which secures the cutting member in place. The free end of this shield or apron is flared as bestv shown yin Fig. 1 and rests against the peripheral face of the pipe, rod or otherwvorlr being operated upon immediately at the rear of the cutting member 18.

The rollers 35 and 48 should be substan-v tiallyv equal in width and suiiiciently long to prevent any possibility of angular movement of the tool with respect to the work upon which it is employed. The number .of rollers engaging the work and the length will'by turning of the ladjusting nut 39.

When the pipe, rod cr other work kbeing operated upon has been cut in two, the seci tions may be readily drawn from the tool, under most circumstances, without the necessity of loosening the gripping jaws and chain. However, under any circumstances, one or two turns of the adjusting nut 39 will be sufficient to free the tool from the work operated upon.

Although I have illustrated and described i my improved cutting tool in all its details,

it will of course be understood that I do not wish in any way to limit myself to the specific details of construction illustrated and described as various minor changes,

within the scope of the appended claims, may be made at any time, if desired, without in the slightest degree departing from the spirit of my invention.

Having thus described the invention, what is claimed as new is:

1. A tool of the class described including a stock, a cutter mounted at one end of the stock, and work engaging means carried by the stock and adapted to clamp the tool with the cutter in engagement with the work, said means including work engaging jaws swingingly connected to the stock, and a flexible element having detachable engagement with the jaws and adapted to encircle the work.

2. A tool of the class described including a stock, a cutter mounted at one end of the stock, and work engaging means carried by vthe stock and adapted to clamp the tool with the cutter in engagement with the work, said means including work engaging jaws swingingly connected to the stock, and a flexible element having detachable engagement with the aws and adapted to encircle the work, the work engaging jaws terminating in rollers which bear against the work.

3. A tool of the class described including a stock, a cutter mounted at one end of the stock, and work engaging means carried by the stock and adapted to clamp the tool with the cutter in engagement with the work, said means including work engaging jaws swingingly connected to the stock, and a flexible element having detachable engagementJ with the jaws and adapted to encircle the work, the tiexible elements being constructed with rollers which engage against the work.

li. A tool of the class described including a stock, a cutter mounted at one end of the stock, and work engaging means carried by the stock and adapted to clamp the tool with the cutter in engagement with the work, said means including work engaging jaws swingingly connected to the stock, and a flexible element having detachable engagement with the jaws and adapted to encircle the work, the work engaging jaws and flexible element being provided with work engaging rollers.

5. A tool of the class described including a stock, aI cutter mounted at one end of the stock, means for advancing and retracting the cutter, work-engaging jaws swingingly mounted upon the stock, a work engaging chain detachably connecting the jaws, and means for swinging the free ends of the jaws toward and away from each other.

6. A tool ot' the class described including a stock, a cutter mounted at one end of the stock and movable toward and away theretrom, primary work engaging jaws pivotally connected to the stock, a work embracing chain adapted for detachable connection with the jaws, and means for swinging the work engaging aws toward and away from each other.

7. A tool of the class described including a stock, a cutter mounted at one end of the stock and movable toward and away therefrom, primary work engaging jaws pivotally connected to the stock, a work embracing chain adapted for detachable connection with the jaws, and means for swinging the work engaging jaws toward and away from each other, said means including a member slidably mounted on the stock, and secondary jaws pivotally connecting said sliding member with the tree ends of the primary jaws.

S. A tool of the class described including a stock, a cutter mounted at one end of the stock and movable toward and away therefrom, primary work engaging jaws pivotally connected to the stock, a work einbracing chain adapted `for detachable connection with the jaws, and means for swinging the work engaging jaws toward and away from each other, said4 means including a member slidably mounted on the stock, secondary jaws pivotally connecting said sliding member with the tree ends of the primary jaws, and means tor reciprocating said sliding member.

9. A tool of the class described including stock, a cutter reciprocably mounted at one end of the stock, primary jaws swingingly connected to the stock and provided with work engaging rollers at their free ends, a roller link chain having detachable engagement with said jaws and adapted to encircle the work, a ring slidably mounted on the stock, secondary jaws pivotally connecting the ring with the tree ends of the primary jaws, an adjusting nut thread-ed upon the intermediate portion of the stock, and swiveled connecting means between the adjusting nut and ring. l

l0. A tool of the class described including a stock, a cutting tool holding chuck mounted for longitudinal movement in one end of the stock, means for 'advancing and retracting said chuck, means for holding the chuck against turning movement, work engaging jaws swingingly mounted upon the stock andprovided with roller bearings at their .t'reeI ends and intermediate of their length with outwardly directed hooks, a roller link chain adapted :tor detachable engagement with the hooks and arranged to embrace work being operated upon, and means for moving the jaws toward and away from each other to bring their rollers into engagement with the work and so tension the chain.

in testimony whereof l aiiiX my signature in presence of two witnesses.

LYLE J. GILMOUR, SAMUEL F. LurToN.

[In sl Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, 2D. 3. 

